Rezista Mainspring #179 for Bulova 6AO, 6M, 9P, Gruen 485, 487, Omega R17.8 - Steel

Rezista No. 179 steel mainspring for Bulova 6AO, 6M, 9P, Gruen 485, 487, Omega R17.8 caliber movements, plus several others as well. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.